Controlltctg l



A. ROESCH.

CONTROLLING APPARHUS.

Armenian FILED nac as, I919.

Patented Oct. 3, 1922.

2 SHEETS-SHEET l.

WITNESSES Wad Q 1W 5W 8, MM M ATTORNEYS A. ROESCH.

CONTROLLING APPARATUS.

nrucAnon nun DEC IB,1919.

1,430,852. Patented Oct. 3,1922.

2 SHEETS-SHUT 2. jlqfi.

nnmllullllu n WITNESSES Patented Oct.3,1922. 1,430,852 UNITED STATES PAT' ENro Fiica,

AL'FRED Benson, or BROOKLYN, NEW was; assrenon r CHARLES :r. TAGLIABUE,MANUFACTURING 00., on nnooxmm, new 55033.1(, nconroan'rroiv on NEWYORK.

T 0 all whom it may concern: p cured in anjfi conven ient nanner, thespindle Be it known that I; ALFRED RoEso'H, 'a' ;.l2 .pf;' saidclock-work carrying a cam 13 citizen of' the United States,jandresidentlipfgpredeterrnined form and dimensions. In of the borough ofBrooklyn, countyh'of tlieexampleshown,th a' 13i o tru t-- Kings, cityand State of New York, have. ied. 't o. erform ijtsifiunetionsin amaximum invented certainnew and useful Improve periodotjour.and"one;halfhours and comments in" a Controlling Apparatus, of whichprlsesaperipheral segmental section 14 conthe"following is aspecification; nected by a'radialysection 15 with a periph- My inventionrelates, to" automatic c on-'; era1 segmental,; section 16 of relativelytrolling. apparatus and'more"' articul afljtO:"zg ieateigradius andwhichiterminates at an "that'ty'pe thereof whereby predetermined.flinwardlj extending 'radiaL section 17 as conditions ottemperature';pressure, etc, are hoy' n lathe -drawings, gthe remaining peautomatically produced withinh "a" 'iven; I1Qh(;!ri{0f the cam'belngofreduced radius j periodof time. The field of usepf the' ap-1 sand ofanysuitable shape Scales 18 and paratus is very extensive;tofae1l1tate the19' comprisin indications designating five understanding thereofand-without intend- :m inute per iod -are located. adjacent to the ingto. definethelimits of thein'vention it .},'jperiphe1fal sectionsgl$and16, those indijis .illustrated and described in eonnectlon cations"ipvhichpdesignate, hours and quarter with a vulcanizer. Incarryingoutthe proc- ,hour's l )eing indicated; by the proper figure 20ess of vulcanization under certaingconditions designations. Q'Ihe'cam'13 includes further t is n e y that the ei pe' aeiyiel h Lag ei sflleqss' ie e pr erabl of @1111- vulcanizer shall; be progress vely'ncreased loiil o r other su tablef trans arent material "for apredetermined period of t me and then qyhlehconst tutes aqneans w erebythe effecinaintained at a given point for another {we itijz'ejieripheralor 'other contour of the cam determined period of time, after'whioh thelis' changedljit and, is adj ustably mounted h Producing m. m y b m e eee eid:2 yfl qingpiv d a 21 in the f-shu'tofl'. "For instance,"in"curinlrubber ofh' 'ngle gfolmed 'by'ithe ra dialsection15 and 'difl'erentcompositions and o different Peri 'lieral section lfiig,thisfniember 20exthickness for various kinds of gioods; difin s iirfabe' engagementwith said cam 3G1ferenttemperatures and diflerent periods of '13 towardtheperipheral section 14 and is time, both for the rising and'holdin"tem- I formedf'jvitii an'qintegral continuation 22 peratures arerequired so that a' fiexib' lty of prov 1d ed j with a closed slot 23curved about djustment is necessary in order tofprovide the; ivot '21and extending over the clock fan 'eflieient apparatus. spi n le"12."Tolfacilita te the actuation 0:5 85 'The object of my invention is torovide "said inemberQO 'foradjustment purposes an a simplified apparatuswhereb the a we reoperating handl e 245 or its equivalent may sults areobtained in anove manner and beprovidedlat afsuit'able point 'as shownin whereby interchanging of parts toefi'ect a igs. 2 and 3. 5 The member20 .isadjusted change in adjustment is practicallyfellini- 're'latlv'elyt'olthe indications 18 and by its natedi Other more specificobjectsjwill apadjustmentpredeterminesthe period of time pear from thedescription hereinafter and 'during'which {progressive increase oftemthefeatures of novelty will be pointed out perature'i's hroughtjaboutas will be more "in the appended claims I A 1fi11l st 'forth hereinafter. I In addition to In the accompanying drawings, which, fortheabo've'thejcam includes an arm 25 which convenience of description,show an example is rotatably mounted 'u on the spindle 12 of theinvention in connection with a vulin surface engagement with thecontinuation canizer Figure 1 is a diagrammatic eleva- 22 andextends'r'adially outward to the pe tion of the apparatus; 2 is a detaileleriphery of the s'egmental section 16 of said vation on an enlargedscale,'of the'controlcam! The 'f ree end of said arm 25 is bent lingapparatus itself and Fig. 3 is' a fragtransversely to the major portionthereof so mentary plan view. as to form 'a' cut-oif flange 26 whichoverlies In its illustrated form the controlling apthesegm'ental sect1on16 and is formed with paratus comprises a support 10 which may aninclin'edend surface 27 8s shown in Fig. be in'the 'nature' of a base orboard upon 3; A- manipulating 'handle o'r knob 28 is which aconventional clock-work 11 is 'se- *located u'pon'the arm 25 at asuitable-point am plc, the predetermined period, of time during whichthe temperature is to be mamtained at an approximately fixed point.

Any convenient and'well-known means may' be provided for fixing themember and thearm in their adjusted positions; for

instance as 1 shown the outer end of the clock-spindle 12 may bescrewsthre'adedfor the accommodation of a preferably knurled nut whichbybeing screwed up against the arm 25, serves'to ela mp fthe latter andthe member 20 between itselfand .the cam 13 against movement relativelyto each other vices and to said cam. The member 20 and the "arm 25 ortheir equivalentsconstiti ite dc in whatever form they lma'ybe constructed' and with whatever. type of cam they may be at will;

be of variedconstructions'o'faras'therange of progressive increases intemperature and the range of sustained temperatures is 'concerned. Thusin the illustrated example the adjustment 'whereby'ji'icrease's oftemperature periods are controlled range s from .five

' minutes to one and one half hours as indicated by, the scale 18 whilethe adiust nent controlling the substantially fixed temperature periodsextends over three hours as indicated by'th'e scale .19." The periodsor' timeduring which the resultssought for are predetermined aregoverned by the adjustments' of the member 20 and arm 25. v

Furthermore the peripheral sections, 14 and 16 are arrangedin accordancewith the particular processior which the ,particular cam 13 is intended.Thusin aproce'ss in which the effective temperature range .be-

gins at 212F. and graduallyrises to and is sustained at 300 F. thesection 14 wilhrepresent 212 F. and the section 16 will-represent 300 F.while the intermediate degrees between thesetwo limits are representedby the active edge of the member 20.

'The mechanism which .co-acts with the cam 13 and its parts to produce.the desired time and temperature control may the of varied form suitablefor the intended purposes. 1n the illustrated example said mechanismincludes a main lever :31 fulcrumed at 32 upon a bracket 33 which may hesocared to the support 10 in any convenient manner as by means of screws34. A camlever 35 is pivotally mounted upon the main lever 31 tomoveabout an axis 36which is transverse to the fulcrum 32, said cam-lever35, by means of a spring 37,-being normally combined, whereby thejoperat in g characteristics of said cam may be var ed:

It will be understood that theicami1i3jmay hereinafter set forth,-is'maintained in en- 'gagement'with the periphery of the cam 13 byvm eansof a spring 40 extending between opposed portions of the lever 31 andbracket 33 as shown in Fig. 2. The main lever 31 carries also a capsularspring 41 of conventional construction or its e uivalent, which capsularspringis connects by ineans of a fine capillary tube 42 with La}thermostatic bulb'f13 'containin a volatile'fluid in the wellgknown way.Ihe thermostatic bulb 43 or its e uivalent constitutes a sensitive mem,b'erwhich is locatedywithinjthe zone where the conditionsoftemperature, pressure, etc. are to be chritiblldgfin the'illustratedex- ;arnple the bulb 43 is connected with and extends into a jvulcanizer 4A whichfl may be ,fi 'a iy e ing ype. Y

ghemain lever 31 carries iiil theran auxilia ry lever .415 Which ispivotally mounted a s; spams ";upo n salidwmain-lever ,IIhe auxiliarylever;gfi e xtends across and beyond the capsularlspi 'l'ng 41 or its.uivalent and is. ro-

videdwithan ,adjusta 1e, screvv,.48f 'vv ich ,is inainta'ined,,, in.contact with the capsiilan g; etwee'n theflevers 31 and 45 as,illustraty'dlinrig;2.5 1%), facilitate the ad'ust- I merit the screwABma'yI be provided wit co-operatin ',with

an indic t n P -ml 0 scales, produced upon ,a scale mem er, 5 1"arylever 45. -The latloose y' within..an exhaust passage 53. of a,valvecasmgfi t and having its inner end in ,and communicating with thepassage 53 thereof. The valve casing in the .example shown isrmounted.upon ,the support .10 and ifurther -constructec l with an inlet port 57and,with.an outlet port '58 both of which ..co.mmumcate .Wltl'l thechamber 56 the in- ;letyport 57 being connected by means of a pipe :59with a source of compressed air and! the outlet .port 58 being connectedby means of a pipe 60With the diaphragm chamber 61 of a diaphragm motorvalve 62 located in the inlet pipe 63 whereby steam or other heating nedumis conducted tothe vul-;

canizer: The diaphragm valve may be of any. ordinary construction andismaintained in and returned to an open position by meansof a spring64.- and-ls'closed by the action of the'air pressure upon the dia-.

phragm in the diaphragm chamber 61 m the well-known manner. 3

y ,A .second valve-casing 65, which may be ,a. duplicate in allrespects. of .the valve cassi ns issec ted up n the supp rt mend s.47ll'ocated at proper points.-

has its i nlet port .66 connected by means of a. connection witlfthepreviously mentionedsourcejof compressed air and its outlet girt GBconnect'e'd by means of apipe 69 5 with the diaphragm chamber 70 of ablow- Qfi alye t'l locate' d. in'jn ,b l o v-oil' pipe 72 iyhich;communicates with the vulcanizer 44. ,lhgyalvefrgl maybe'afluplicate ofthe valve 62 and; n ayi sirii larlytbe maintained in and -r,eturned.tojreopen position by means of a spgingpfii and pl osed b'y' means of theair rpressure npon tlie diaphragm in the chain'- -b(e 1; "7 ".Aba-llvalve similar to the valve gfi 5 and iilieivisedqcatediin achamber, enigages pr s secur'd to the end. of a valve sten fig' vhichgisfitte'dlo'oselyjin the exhaust az sssseisfnthetqi s Salami P j ine slthesam 'i P tPHifi Ey a Pr j rti nilisarnisd hi h u l yne '5, the projec tionflp ,being normallyjspacecl from the s a e-'1 a'. u 'i, .]F 'g= asImpeewtivnbeii e i fi a-nil m 25 .of hezcamtlliza-reset inaccordanciewith the predetermined periods .of time during which a! :Pmgressiyeincre s o mp e a d .mfixed temperature are respectively desired and:secured .their adjusted positions by emeans ot thenutBO. For. instance,as shown -in ,the,illustrated example the, outer edge -;of the memben20bisects the peripheral porjtion lg ofethecam 13 at the indicationfifteen got, the seale, ;lB,. vvhile'-the pointer 29 of flae p soon asthis happens; air under pressure um -25 is imre istrylwith theindication thirtyfofithe :s 51 .19 thus indicating that --a;-progressive,increase of temperature in the -JYU1Q3Q1ZBI &4; will be hadfor fifteen mini-ute sf a;fterg-, vhigh, th e temperature will be -heldstatic;uirp'y foes period 'of thirty minantes.) BY adjustingthe member20 and arm 01259110; diflerent points along the scales 18 s lie-1nd.- L9anx-,.pr edetermined result may be .-,,si flarl jr attained; theadjustment of the iniemberflllis ,faci litated because of its trans-1,;parengy vhichi rnal(es .the scale 18 visible as -to thepperatgr at.all, times. After the de- .o-sired adjustmentpf themember 20 and arm.-25 been effected, the cam l3'is rotatably ia djustediofbuing the angleformed by ,the

[peripheral portion 14 and the outer edge of soithesmemberflflintofregistry with the end of .1sthe isransversemembcr39 of the'cam-lever 35 said tljan5verse member being in engage .5 went withthe-earn at this point as shown in ';-=I ig.e2.- With the parts thisposition the valve stem 7a of the valve is free from :-1-estraint,.,sothat the air pressure will force Lihwball-valve oftbe casing against thex'mGHdOfthG exhaust passage thereof to close athe-samaand will passthrough the chamber Goof said ce sin 65 and pipe 69 to the dia--phrag'mchain er 7O andthus maintain the -:!blowofl valve fll in itsclosed position "-iagainst the tension of its spring 73. (M-3BBC3US8' oftheengagement of the trans- 65 verse member 39 with the peripheral sec-'which the temperature accordingly begins to rise, As soon as saidtemperature-reaches 212 F., the point representedinthe'present instanceby the carn'sectionsl aud to which is expanded somewhat and =accordinglyexerts aipressure against said adjusting'screw :48 and moves-theauxiliary-lever 4E5 on-its pivot46. Because of the fact'thatthe-capsular spring 41 and' the-auxiliaryrlever fi are bothcarried'by'themain lever=:31"the 'des cribed sivinging movement" of:said :zauxi liary-lever 45 1s relative' tothe uiaimlever and in a(lirecticnto compress :the spring-49 and more the one end of saidauxiliary lever loanay from the valve steni'52. Theda'tter beingtherebyrelievedfrom lestraint the air pressure'immediately forces the hall:velve 55 against the inner end of themhaust passage 53 to closethe sarn'e and'to establish communication betweem the ports passes into thepipe 60 and'to the diaphragm chamber 61 and bi acting upon ztheadiasupply of steainto the vulca'ni'zer. 1'

its closed position "and thus decreases the phragmtherein'moves thevalve 62.towai:'di-rr 2 through the medium of the clockrvo'rkll:

thetransv'crse' member 39 begins to'ride or climb up on the inclifiedouter edgeo f the member 20 and thereby moves the cam lever 35 and "mainlever 31 on the fulcrum 32 against the tension of ;the spring 40, Because of the fact that the auxiliary leverfi is pivoted upon the1113154? s'vhi'ch' fornipart of the maiir'lever 3i and because of thelocation of the spring 49 between thetwo 'takes of the described pivotalmovement of said main lever 31 and thus exerts a pressure upon the valvestem 52 in direction of its length; This causes a lengthwise move mc-ntof said stem 52 in the passage 53 which forces the ball valve 55 mvavfrom the end ofsairl passage 53 s'o'that the supply of air pressure tothe chamber 56 is re duced and the outlet port158 is brought in- .tocommunication with the exhaust passage 53 through the chamber The airpressure previously ex'isting upon the diaphram in the diaphragm chamber61 is thus reduced with the result that the valve 62 is openedfteen'minutes it takes for the transi -erse s'traint theiair pressureasuppl-ytemperature thus continues to rise inproelt will be unclerstoouof the cam 13 to open somewhat under the influence 01 us spring 64whereby: an. increased supply. of steam or its-equivalentiis admitted tothe vulcauizer 44:. fllhis causes an increase ofv temperature inthe-dattewwhich acts immediately upon the -.therm0static bulb 43 andthereby brings about a. 'flirthenexpansionofthe capsular springAlwhiclr-asa result again exerts a pressure against-the adjusting screw 48and againymoves,the-.-auxiliary lever .45 on its irot lG-aimy'fromthevalve stem 52 The latter'being thereby againreliered from re immediatelyforces the-.ballpwalve-55 ,against the innerehd of the exhaust/passage53 to close the seine and tor-establish communication. between the ports57" and-,58 by Eway of thecharnber 56. Asnsoon :as {this happens,. air.under pressure passes-intothepipe 60 and to the diaphragm whamberrfiland v by zwting upon the diaphragm thereini aga umoves; the ralve 62'towar'd xits-closed -position and, again detjmiee gg gat aminei'i'pheraljportibi i ""th' finite-titted examiner the Ililmaslesithelsupplyrflf steam to the Vulcan- 1281".

'ilevers i31t=and 45 and o tivelyr totthelever 3].- continuesas long asthestransverse member 39 continues to ride waitingthew-inclined surfaceof the member ressive steps in said vulcanizerduring the J cl that thecapsu ar each time just far spring 41 is expanded Y auizer 14 from goingmaterially beyond the the 'ber 39 happenstobe located." In otherff wordstheaction of the capsular spring upon; the auxiliary lever lfi-checksany tendency the steam valre too far. 1,

--V.Vhen the transverse member 39 iiiiallyi:

' atthe end of fifteen minutes, reaches thepc;

-ripherul portion 16-0f the. earn 13, a terntpernturecorrespoudingtothat represented by said portion 16 will have been reached in the"Tulcanizer '14, this temperaturein the illus- F. and the capsular springL1 will be expanded to an extent corresponding to this degree,

to the axis of the cam nillrernain substantially inactive during thetime that the transverse member 39 remains upon said cam section 16,whereby the tern perature in the vulcanizer is sustained at ern ateactuation ofithe combined f-the lever 45 relast ee tie 'ets sufficientlystein M is conn'hunicii Because ofthe fact that the portion 16 is an arcconcentric V 13, the main lever 31 4,

49 to actuate the V'alire tension of the I 37 "the: trimmin XerSQ r nethe simmer-estimat chamber '70 is reused, thus permitting the Tlto openuncler'the action of the spring 7 csnthe saime'gby the? of said mediumis controlled, mechalgthro ugh-. the nism whereby theyaztuation of saidcontrolling-means is controlled in a predetermined 1-!i fil heiparmculargoperation,having;heenlinmanner for a given period of time, amems'fiishedgtheaapparatus maygbeiresehatbemg l 81 SUI).S 1t1YG totemperature changes exx ndet wp hafl1bheimembep 2Q;gr1 (l arm tendingnto said element tinctureoperat ng Qniay; minaimrirrfitheine adjusted,posit1qns. 1f 5 device carried by said mechanism so as to-rthelopbrationl is;itb,-rbeirepeated or otherwisepartake oi"; themovements thereof and con- "s et'fifldlfiernt resu tsian d sire -1' A th.1 2 w j e member y Said' 10 cam l3 is manuallm-mtemd .tmhflestb -me5u1im c p si t p t ha g to the iStaI'tiHg-nP QtiQ n t Q smi s t e Ql a aI g,-und'efs the .jnfluencg ,qf the spring.,3f( wlll be-l 2 ..Thecombination of element in n 'it t 'wgpfiflbackginto eontact with,yvhmlrthc temperature is to be bbe-rpm fifi as soogi gs;;the. radialport on l'f .conduit for admitting a heating med um to said element, avalvein said conduit wherelfiibf the cam lahas iia edrtht nswrseme iavmg been by the flow otheating medium is controlled, n lever, anauxiliary lever carried fiber aaealmp hsnriwpr s, ai ten l foroednfnomthe per pr ltras; :13 mm 0 time controlled mechanism for op- -=whichhas-previously reachedthe vulqanizer flow 44' is thustzgquiekly,ublownie-ofi' pipe=72s hs y the-n me rdesoribed theyr, transversenembeg 39 1S thereby, v t res'sedia ai-hst heis rfi e cam 13,; yret g-seo i ni ji ki g 7 sq$hg t theme-jot,- said valve n a predetermined mannermmmheimdialipnrti auli' ..a i sd sa e-ato ia g en-w m pt time, sheetsensitive transvegminemlen i the-1am v-;i=. vaa -J.flelemb ni a m insi td ld -a a wi thei-tnerin mip vi r u a pa tomatiqailly @etnmed. v, v

saidzi can,ampere(transv sse n ibeyQn i-so rea s. the -w nie he sprig-taming resen e -t 5 e e i s W s t ee be w er by mby ithe. plm i dm-lfig'will-ibemnderstoodthat :said aux harytleverns actnatedln responseiEEthBEiZY- B-DSV QE m mber-.-. 9.a flitst wa mp a s s- 9 e mo em ngeafieieth ving:h fi kiiQWduflQ f ne. h n -kl d -:=the peripherynpfnthfcam by. the;inclinecl -glcscribed icompr sing a; {.YZ'LIYC, ,meghap smisunfaoe'j27; I 1Q n t dl b g d ,whereby,,the actuatipn of said;valveisconthat portionofetb a-Qflmifidifiliiph m' npas s iw:

.gzliicltg mnnectsz-wfith the; m r-lfi da-b 6} rpo'rtion 1% so. Ithatzthe; automatic return. the transverse member gtoats operativeposn,V 35 1 .tion pin said cam is. not {interfered with. 1401 m? chan es.

l'ug'llhenapparatus isiisimlll -ri lng n s e f conflfihpgsandi-ieflicienti-imioperationmandl.provides a.-; QQS YIDFd comprisinga;yalve,a ma n lever, 'means .lwh'erebyyi Fpredetermined time and 1 flll i f curled F 6, gm'cmon .ig t ntr01 isautorfn'atically secur dtrolled magcl'ianism for ac tuating sardleversmin-aireliablevzmannermswhefiproyisiontotthe I ..1 n to Q t "Ql. -l1agifltltlqil qf shld i -fi-djlista-ble am pr'ovidesawidera of ad- Y afimb r sensltive to temperature jjust'flienfi'inithQmpParatuggfldpbylates th changes and aco operatmg device carr ed 'nece'sitynforiahsubstitntion; oiyelements. or; 7 Q e of s-ind levers and partakingofth inovcments. thereof whereby said auxiliary specifically ofdifferent cams, eachgtime an different time and temperature codependently sa d main to 'SLHtltemperature Y trolledgmid meanssensitive. to temperatu re dial; ol aiigcs cai'rierl partly -by .saidmechanism f to parta'rreof the movements thereof 'wherev i r,.. y saidmechanism ,rcsponds to said teminechan ism of :the {lcind 45 mbination'. fi i n s a ed in is desired. em t" n response It will beunderstood that the illustration g L y and 'de'scriptioiiofitheapparatus in connec A f ffiq l g g me hanism of the. kind tion with avulcanizer for controlling the (19501 comprlsmg R Y 911mm admission of aheatin medium thereto is an ve carried thereby, a cam not to be taken asdefining the limits of the for Mtuatmg 5 m 111115011 COD- invention asthe vlatter may be efiiciently 9' h actllatlon of F cam used in manyother ways and for controlling mch 1d1ng l mQ dances f y lts P mediaother than steam or equivalent era-ting cbilrflcterlstlcs are Val'led, amem- Various changes in the specific form sensltlje to temperature gmeans shown and described may be made within actuatlps Smd P F capsularthe scope of the claims without departing spl'mg earned y sald mamLBVBI' 80 as 130 f th i it f my i ti partake of the movements thereofand connected with said member whereby said auxiliary lever is actuatedindependently of said main lever in response to temperature changes.

6. A controlling mechanism of the kind described comprising a cam havingperiph- I claim:

LThe combination of which the temperature is to be controlled, a conduitfor conducting a medium to said element whereby the temperature thereinis affected, means in said conduit whereby the an element in controlled,a s

d. levers to control the actuation mg carried by said main lever, a,

eral portions of different radii, a member adjnstably mounted upon saidram and connecting ,the two peripheral portions thereof, an aimadju'stably mounted upon said cam and'including an end surface inclinedtransv'er'sely across" the peripheral portion of larger radius, meansfor securing said mem her and arm in their adjusted positions,timevontrolled mechanism for operating said 10 cam, a pivoted mainlever, an auxiliary lever pivot ally mounted on said main lever,

a cam l'ver' pivotally mounted on said main lever to swing about an axistransverse to that of the main lever and arranged to ride upon saidmember from oneperipheral portion of the c am to the other peripheralpor tion thereof" and to traverse the latter r whereby said two lerersare actuated in uniso n to control the actuation of said valve,

said f catfi' lever "*be'inQri forced" transversely from the peripheral,ortion of said cam by I the inclined endsur ace of said arm to re-"move thgadontrol' of said levers from said valve," a 'me'mber sensitive'to temperature; zs chariges and a capsular spring carried bysaidmaliilever so as'to move therewith and designating periods 0 wherebythe controlling function is performed, a cam whereby said mechanism isoperated, means for actuating said (La-mp3 member adj ustably 'niounteduponisaid camto provide an adjustable rise thereon, an arm" carried bysaid cam and: adjustable thereon relatively -to said member, .a eutsoifeflange located upon said arm a'ndprojecting transversely acrossand-beyond the active surfaceof said cam whereby saidmechanism is forcedfrom said cam ata predetermined point 'initsrotationn' I .-:;v 1 10. Ina controlling mechanismuof the kind described a eamhaving adjacentperipheral portions ofdifl'erent radii,-:scale indications along saidferipheral :pqrtions time and subdi-ix visions thereof, a membeipivotally uconnected"'w'ith said' cam" at the 'beginiiingbf theph'eripheral portion of greater' radius and intersecting 'theperipherals-portion: 10f lesser radius -in co' operative relatioirto-ioners of said"scales, an armflpivotallyhmovable about thea'xis-ofsaid cam; aflangegomsaid arm-i projecting transverselyvaorossmand beyond the peripheral porti-oni oi greater coniiected yvith-said sens'itive'member whereradius; a pointer co operatin withitheother 5- by said auxiliaiy lever is actuated independl tq i di t-atlfiadj tm ti f aid a 'f s aid main lever response to said" aqtemperatur changes.

ivherebylthe controlling function is persc -reams camwhereby saidmechanism is operated, means for actuating said cam and 35 a devicecarried by saidcam whereby said mechanism is'disengaged from the activesurfaoe of said cm at a predetermined point in its rotation. v

I a oontrollin apparatus, mechanism 4'6 whereby the 'co'ntro lingfunction is pertermed, a cam whereby said mechanism is opgrated, meansfor'actuating said cam, a

meniber adjustably' mounted upon said cam to provide an adjustable risethereon and a 45 device carried by saidcam and adjustable thereonrelatively to said member whereby said mechanism is disengaged from theactive surface of said cam at a predetermined point in its rotation.

50 p ":9'. a controlling apparatus, mechanism" "andmeans for; securingsaid membermand I j p armanthen-ad usted{positions .i; 7. In .acontrolling apparatus, mechanism l L' Ih a controlling device'weamgamember adjustably mounted ori' said 'cam t'oprou i'ide an adjustablerise thereonm nd a quti-ofi device carried' by sai'd aind arrangedtoexert'a c'amming aotiontransvefise boithe active surface of said cam.

12. In acontrolling devioe asv-cam;r-a meme ber adjustably 'inounted onsaidpcam to provide an adj ustable risethereonrsan'iiarmicarried'by said"cam and adjustablethereonrel- 'atively to'said member; a cut ofiiflangelocated on said arm and projeietiiigtmnsverse- 1y acrossand-'beyond-the' activeirsunface of said cam and means whereby'ibotlvsaidlmemberand-said armare "fixed :in theiria/djusted positions; w: i r5 In testimony whereof lihave hereuntdset my hand.

ROESCH.

